Shooting training device with subcaliber tube for recoil-free weapon with telescopic tubes



Jam 10, 1967 Flled Feb 19, 1965 3,296,928 BCALIBER TUBE FOR EAPON WITH TELESCOPIC TU BBS 2 Sheets$heet 1 W. LUBBERS SHOOTING TRAINING DEVICE WITH su RECOIL-FREE w LUB M) 1 LL I DEZSOE 5T EIN H R'Z.

W. LUBBERS Jdn; 10, 1967 SHOOTING TRAINING DEVICE WITH SUBCALIBER TUBE FOR RECOIL-FREE WEAPON WITH TELESCOPIC TUBES Filed Feb. 19, 1965 2 Sheets-Sheet 2 lm/emar.

WILL! LUBBERS D ElSOE STEIN HER? United States Patent SHOOTING TRAINING DEVICE WITH SUBCALI- BER TUBE FOR RECOlL-FREElWEAPON WITH TELESEOPIC TUBES Willi Liibbers, Trittau Bezirk Hamburg, Germany, as-

signor ttOi Nico Pyrotechnik Hanns-Jurgen Diederichs KGS; Tnittau, Germany Filed Feb. 19, 1965,.Ser. No. 433,914 Claims priority, .applicatign germany, Feb. 22, 1964,

4, l 6 Claims. (Cl. 89-1501) The present invention relates to a shooting training device for an armor piercing recoil-free telescopic weapon comprising telescopic tubes, eg an anti tank weapon.

Thistype of arms is denoted a one-man-weapon for a single use and is, therefore, also called a throw-away weapon, which isworthless after having been fired once. Firing practice with this kind of weapon is very expensive, because expensive explosive projectiles must be used.

In otherttypes of armorpiercing recoil-free weapons it has been known to provide said weapons for training purposes with 1a subcaliber tube, from which subcaliber ammunition can be fired.

However, even in the case of these normal weapons, it is diflicult to construct the training weapon so that all operations in? connection with a training firing take place in the same way as in combat. In telescopic weapons these difficulties of construction are increased to such an extent that .up to date no useful telescopic training weapons have become known. Not only constructional difiiculties.;structure; of the: weapon in general have to be overcome, but the ignition devices have to be modified specifically since. the firing. pins commonly used with live weaponscannot be readily applicable to training weapons.

These problems are resolved according to the present invention by rendering the subcaliber tube applied to the training 1 weapon about as long as the shoved together weapon and is fixedly secured at the rear end of the inner tube of the. telescopic weapon and is slidably supported ingthe front end of said inner tube, electrical ignition meansbeing provided for the subcaliber cartridge inserted in the rear end of the subcaliber tube.

As. the: operations in connection with training firing should be as similar as possible to those in combat, it is of advantage to effect the ignition by an electric contact which is connected with a normal firing device designed like that of a live weapon and the safety installations at the-firing device should also correspond to those of a live weapon.

As the training cartridge is in the inner tube of the weapon; while the firing device is fixed to the outer tube, itgisnguidei to transmit the electric line necessary for the It isadvisable to. conduct thefiring circuit leading fromthe inner tube and the cartridge to the outer tube and to the firing. device over contacts, which are closed only in extended-state of the weapon. According to the invention this. can. be especially safeguarded by guiding the inner tube .extendably but not rotatably in the outer tube and providing the inner tube and the outer tube on their outer and inner: side, respectively, with contact surfaces facing :;each other,.the contact faces being pressed to- I gether by spring: tension.

In. order. to avoid. closing of contact pairs of different voltagewby sliding together on a metallic surface when parts of the weapon are pushed together, it is advantage that the outer tube should consist of an insulating mate rial or. be: covered by an insulating material on the surfacefacing such contacts, while the inner tube receiving the ignition battery. formsthe mass (earthing pole).

Itihasw proved satisfactory to provide for the ignition 3,296,928 Patented Jan. 10, 1967 ice a connection wire with a plug at the cartridge and sockets fitting therewith at the rear end of the inner tube and connected with the ignition line. In this manner the training weapon can be readily used for firing several cartridges one after another.

The invention is illustrated in the accompanying drawings by way of example. In the drawings:

FIG. 1 is a view of the weapon in its condition for transportation,

FIG. 2 is a view of the training weapon partially in longitudinal section in the condition ready to fire,

FIG. 3 shows a cartridge partially in longitudinal section,

FIG. 4 shows the wiring diagram of the ignition device,

FIG. 5 is a partial section through the rear end of the weapon,

FIG. 6 is a partial section along line I-I of FIG. 5,

FIG. 7 is a section through the firing device with the safety installation in secured condition,

FIG. 8 shows the same parts as FIG. 7, during firing,

FIG. 9 is a section along line IIII of FIG. 2.

When the weapon is contracted (FIG. 1) it is approximately as long as the outer tube 1. The device can be shut fore and aft by lids or the like. These parts are as well as the visor and the firing device secured by the known safety means.

The firing of the original weapon used in combat is effected by a firing pin, which is cocked by tightening a wire connected therewith after having been unwound during the extension of the telescopic inner tube.

It is not advisable to apply this system to a training appliance, because a repetition of the procedure described would be very complicated, since the wire would have to be strained again. This type of firing installation would he, therefore, very inconvenient for a training weapon. Furthermore, a firing pin could not be used be' cause the construction of a training weapon having a subcaliber tube would not allow this. The mounting of a conventional ignition device for firing is practically not possible because of the dimensions and spaces conditions of the original weapon. Therefore, for ignition of the cartridge an electric battery is used, which in connection with a suitably mounted circuit allows repeated firings of the weapon.

Before disclosing the details of the ignition device the total construction of the weapon will now be considered with reference to FIG. 2. From the outer tube 1 the inner tube 2 is drawn out toward the rear. The visor parts 3, 4 and the firing device 5 are fixed at the outer tube 1. The subcaliber tube 6 is of a length that corresponds approximately to that of the weapon when it is pushed together as shown in FIG. 1. The subcaliber tube is firmly positioned in rear by the ring 7 in the rear end of the inner tube, while its front end 8 in the bearing 9 of the outer tube is lengthwise slidable. In the middle it can be additionally supported by a ring 10 in the inner tube. Cartridge 11 is placed in the rear end of the subcaliber tube and is in the present case screwed into it.

The cartridge consists of a subcaliber projectile 12 of a known type, casing 13 with propellant charge 14 as well as of the indicator charge 15 followed by the darn 16. The igniting device 17 ignites the indicator charge 15 which then ignites the propellant charge. The plug 18 for the ignition is inserted into the socket 19 at the rear end of the inner tube.

The wiring system is shown in FIG. 4. It can be seen that the igniting device 17 is connected on the one hand to the mass 20 (earthing pole or ground contact) by wires and the plug 18 with the socket 19 and on the other hand connected to the wire 21. The wire 21 leads to a contact 22 which is connected to the contact means .28

of the firing device 5 by means of the wire 23. In this manner the circuit can be closed over the line 24, the contact 25, the line 26 and the battery 27 the negative pole of which is connected to the mass (earthing pole or ground contact) 20.

The same reference numbers can be found in FIG. 2 for the corresponding parts.

The arrangement of the battery in the inner tube can be 16 from the enlarged view in FIG. 5. The batteries are exchangeable by means of the screw plug 29.

The structure of the firing device is illustrated in FIGS. 7 and 8. The contacts 29 are bridged across the pin 30 which is fixed to the firing lever 31. Security is attained by pin 32 which blocks the tiltable element 33 when the parts of the weapon are pushed together.

The structure of the contacts 22, 25 is illustrated in detail by FIG. 9 which shows a cross section of these contacts when the weapon is in drawn apart condition. The inner tube contains the insulating compound 34, two terminals 35 and 36 in which the wires 21 and 26 end. The contact-caps 37, 38 are pressed outwardly by springs 39, 40 against the corresponding contact surfaces 41, 42. These are connected with the wires 23 and 24 by corresponding screw bolts.

The inner tube is guided unrotatably with respect to the outer tube by the guide grooves 43, in order to safeguard that the corresponding contacts of the inner and outer tube lie on each other when the weapon is drawn apart.

In order to avoid that the contacts-caps 37 and 38 can be connected by conductive bridges when the weapon is pushed together the outer tube is preferably made out of an insulating material or is covered by same in that zones that are passed by the contacts during the motion when the weapon is pushed together.

What is claimed is:

1. A shooting training device for an armor piercing recoil-free telescopic weapon comprising inner and outer telescopic tubes, said inner tube being rearwardly extendable relative to said outer tube to an extended operative position, a subcaliber tube mounted within said telescopic tubes, a bearing mounted within the outer telescopic tube, said subcaliber tube being substantially as long as the weapon in the closed inoperative position and being secured to the rear end of the inner telescopic tube, and being slidably guided in said bearing in the outer telescopic tube, and electrical ignition means being provided for the subcaliber cartridge which is inserted in the rear end of the subcaliber tube.

2. A shooting training device according to claim 1, comprising an electrical contact for the ignition in the firing device, the firing device being of the design of the firing device of the original weapon, and comprising safety means identical to those of the original weapon.

3. A shooting training device according to claim 2, in which lines of the electrical ignition means from the inner telescopic tube and the cartridge to the outer tube and the firing device pass through contacts which are closed only in the extended state of the device.

4. A shooting training device according to claim 3, in which the inner telescopic tube is unrotatably guided in the outer telescopic tube and both tubes have oppositely directed contact surfaces facing each other and are pressed together by spring tension.

5. A shooting training device according to claim 4, in which the outer telescopic tube has a surface of insulating material on its surface bearing the contacts, and the inner tube accommodates the ignition battery and forms the ground contact.

6. A shooting training device according to claim 1, comprising sockets at the rear end of the inner telescopic tube fitting with plugs at the end of the connecting cable leading to the cartridge for ignitioin.

No references cited.

BENJAMIN A. BORCHELT, Primary Examiner. S. W. ENGLE, Assistant Examiner. 

1. A SHOOTING TRAINING DECIVE FOR AN ARMOR PIECING RECOIL-FREE TELESCOPIC WEAPON COMPRISING INNER AND OUTER TELESCOPIC TUBES, SAID INNER TUBE BEING REARWARDLY EXTENDABLE RELATIVE TO SAID OUTER TUBE TO AN EXTENDED OPERATIVE POSITION, A SUBCALIBER TUBE MOUNTED WITHIN SAID TELESCOPIC TUBES, A BEARING MOUNTED WITHIN THE OUTER TELESCOPIC TUBE, SAID SUBCALIBER TUBE BEING SUBSTANTIALLY AS LONG AS THE WEAPON IN THE CLOSED INOPERATIVE POSITION AND BEING SECURED TO THE REAR END OF THE INNER TELESCOPIC TUBE, AND BEING SLIDABLY GUIDED IN SAID BEARING IN THE OUTER TELESCOPIC TUBE, AND ELECTRICAL IGNITION MEANS BEING PROVIDED FOR THE SUBCALIBER CARTRIDGE WHICH IS INSERTED IN THE REAR END OF THE SUBCALIBER TUBE. 